<style>
    .menu-item {
        line-height: 40px;
    }

    .menu-title-text {
        font-size: 15px;
    }
</style>
<div class="div-main-menu">
    <aside class="main-sidebar">
        <section class="sidebar">
            <ul class="sidebar-menu">
                <li class="header">MAIN NAVIGATION</li>
                <li class="${(active == 'users')?string('active', '')} treeview">
                    <a href="#">
                        <i class="fa fa-files-o"></i>
                        <span>系统管理</span>
                        <i class="fa fa-angle-left pull-right"></i>
                    </a>
                    <ul class="treeview-menu">
                        <li class="menu-item"><a href="/admin/bc"><i class="fa fa-user" aria-hidden="true"></i>面板</a>
                        </li>
                    </ul>
                </li>
            </ul>
        </section>
    </aside>
</div>